Practical guide · Engineering and purchasing
Heat sinks: data for an application review
A useful enquiry describes the heat to remove and the environment in which the heat sink will operate. Gather the available data and identify open points: this checklist prepares the discussion, rather than replacing thermal design and project validation.
By Roberto Cesarini ·
1. Power and operating conditions
Identify the device to cool and the heat dissipation in watts, distinguishing continuous operation from peaks. Do not substitute the equipment’s rated power for this value. Include the device datasheet when available.
2. Reference temperatures
Provide the expected ambient temperature near the heat sink and the relevant device temperature limit. Identify measured, estimated and unverified values. Junction, case and heat sink surface are different points: always state which point a temperature refers to.
3. Airflow, orientation and enclosure
Describe natural or fan-assisted cooling, mounting orientation and clearance around the fins. For a heat sink inside an enclosure, share ventilation openings and the airflow path if known. Installation conditions are part of the assessment.
4. Space and mounting
Prepare an available dimensioned drawing or model showing maximum dimensions, contact area, fixings and machining constraints. State its revision. Identify electrical insulation needs and any planned interface material; the heat sink and interface material are separate elements.
5. Quantity and enquiry objective
For an existing item, include its reference and length. For a solution to assess, clarify whether you need samples, a quotation or an initial discussion. Separate the initial quantity from forecast demand and state the desired schedule.
ALUTHERM
For heat sinks and aluminium profiles, the reference on this website is ALUTHERM. My role is consultancy and commercial coordination: specifications, machining, conditions and lead times are confirmed for the particular project.
View the ALUTHERM reference →Share your project data
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Request a heat sink application review →References
General references for thermal parameters, consulted on 11 November 2026. Verify individual device data against the relevant datasheets.